#!/bin/sh

# Copyright (c) 2018 M. Warner Losh <imp@FreeBSD.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#
# PROVIDE: devmatch
# REQUIRE: kld
# BEFORE: netif
# KEYWORD: nojail

. /etc/rc.subr

name="devmatch"
desc="Use devmatch(8) to load kernel modules"
rcvar="${name}_enable"

start_cmd="${name}_start"
stop_cmd=':'
one_nomatch="$2"

devmatch_start()
{
	local x m list boot_safe

	boot_safe=$(kenv -q boot_safe || echo "NO")
	checkyesno boot_safe && return

	if [ -n "$one_nomatch" ]; then
		list=$(devmatch -p "${one_nomatch}" | sort -u)
	else
		sysctl hw.bus.devctl_nomatch_enabled=1 > /dev/null
		list=$(devmatch | sort -u)
	fi

	[ -n "$list" ] || return

	# While kldload can accept multiple modules on the line at once, we loop
	# here in case there's some weird error with one of them.  We also
	# optimize against the false positives or drivers that have symbolic
	# links that confuse devmatch by running it -n.  Finally, we filter out
	# all items in the devmatch_blocklist.
	#
	# We strip all the .ko suffixes off so that one may specify modules
	# with or without .ko. Prior version documented it was without, while
	# the code required it, so accept both now. devmatch produces module
	# names with .ko

	devctl freeze
	x=$(echo "#${devmatch_blocklist:-${devmatch_blacklist}}#$(kenv -q devmatch_blocklist)#" | \
		sed -e "s/ /#/g;s/\.ko#/#/g")
	for m in ${list}; do
		m="${m%.ko}"
		case "${x}" in
		*"#${m}#"*) continue ;;
		esac
		kldstat -q -n ${m} || \
		    (echo "Autoloading module: ${m}"; kldload -n ${m})
	done
	devctl thaw
}

load_rc_config $name

# doesn't make sense to run in a svcj: privileged operations
devmatch_svcj="NO"

run_rc_command "$1"
